jaw retrusion

例句：

1. 1. The patient's jaw was retracted during the surgery.
   手术期间，患者的下颌被向后拉。
2. 2.The dentist performed a jaw retraction to remove the tooth.
   牙医进行了下颌后退操作以移除牙齿。
3. 3. During sleep, the jaw often retracts, which is why we dream.
   在睡眠中，下颌经常向后退缩，这就是为什么我们做梦。